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Experimental study on the regulation function of slit dam against debris flows
Zhou, Gordon G. D.1,2; Hu, H. S.1,2; Song, D.1,2; Zhao, T.3; Chen, X. Q.1,2
Corresponding AuthorHu, H. S.(huhongsen15@mails.ucas.edu.cn)
2019
Source PublicationLANDSLIDES
ISSN1612-510X
Volume16Issue:1Pages:75-90
AbstractSlit dams are open-type structures used to mitigate debris-flow hazards by constricting the flow and attenuating the kinetic energy. However, slit dams are often filled up as they are designed to impede debris volume instead of reducing kinetic energy of debris flows. To better understand the regulation function of slit dams against debris flows, physical model tests were carried out using a 7-m-long flume. The water content and relative post spacing were varied to discern their influence on the regulation function. Results reveal that the velocity attenuation and trapping efficiency is strongly controlled by water content and relative post spacing. Water content fundamentally reflects the degree of liquefaction (effetive grain-contact stress) and capacity of energy dissipation of debris flows. When water content <26%, relative post spacing has a noticeable effect on velocity attenuation, trapping efficiency, and run-out distance. In contrast, when water content 26%, the influence relative post spacing is negligible. Furthermore, a new relationship between velocity attenuation and trapping efficiency for the design of slit dams is proposed to avoid the slit dam being easily filled up by sediments contained in debris flows.
KeywordSlit dam Debris flows Regulation function Relative post spacing Water content
DOI10.1007/s10346-018-1065-2
Indexed BySCI
WOS KeywordGRANULAR FLOW ; LANDSLIDE ; DESIGN ; PRESSURE ; MOBILITY ; DISASTER ; MASS
Language英语
Funding ProjectNational Natural Science Foundation of China[11672318] ; Youth Innovation Promotion Association, CAS ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China[T22-603/15-N]
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000456794700008
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, CAS ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; Research Grants Council of the Government of Hong Kong SAR, China
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24997
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorHu, H. S.
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Coll Water Resources & Hydropower, Chengdu 610065, Sichuan, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhou, Gordon G. D.,Hu, H. S.,Song, D.,et al. Experimental study on the regulation function of slit dam against debris flows[J]. LANDSLIDES,2019,16(1):75-90.
APA Zhou, Gordon G. D.,Hu, H. S.,Song, D.,Zhao, T.,&Chen, X. Q..(2019).Experimental study on the regulation function of slit dam against debris flows.LANDSLIDES,16(1),75-90.
MLA Zhou, Gordon G. D.,et al."Experimental study on the regulation function of slit dam against debris flows".LANDSLIDES 16.1(2019):75-90.
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